Wireless access authentication based on user location

ABSTRACT

A wireless service delivery system determines the position of a device requesting the wireless service and delivers a wireless service to the device if the device&#39;s position is determined to fall within a predefined region of a space. The wireless service delivery may deliver no service or a lower quality/slower service if the device is determined to fall outside the predefined region of the space. The coordinates of the points along the perimeter of the predefined region are stored in a memory and are optionally established during a setup phase by moving a localization device along the perimeter of the region of the space.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims benefit under 35 USC 119(e) of U.S.Application Ser. No. 62/592,210, filed Nov. 29, 2017, the content ofwhich is incorporated herein by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates to user authentication, and moreparticularly to location based authentication.

BACKGROUND OF THE INVENTION

Authentication is of paramount importance in wireless communication andservices of all kinds. Authentication not only allows the serviceproviders to provide wireless service to users, it also enables theprovision of different tiers and quality of services for different userswhile preventing unauthorized access.

Many wireless systems, such as WiFi, use password or key-basedauthentication techniques. Cell phone carriers use the serial number(IMEI) of the phone or a SIM card for authenticating the users. Suchauthentications require the user to obtain the proper password/key ordevice/SIM card from the service provider before the user is grantedaccess to use the service.

BRIEF SUMMARY OF THE INVENTION

A method of wireless service delivery, in accordance with one embodimentof the present invention, includes, in part, determining a position of afirst device requesting the wireless service, delivering a wirelessservice defined by a first tier/quality to the first device if theposition of the first device is determined to fall within a first regionof space, and delivering a wireless service defined by a secondtier/quality to the first device if the position of the first device isdetermined not to fall within the first region of space. In oneembodiment the first tier/quality of service has a faster access thanthe second class/quality of service. In one embodiment, no service isprovided by the second tier/quality of service.

In one embodiment, the method further includes, in part, storing amultitude of coordinates representative of the boundary of the firstregion of space. In one embodiment, the coordinates are stored in amemory disposed in a second device providing the wireless service. Inone embodiment, the method further includes, in part, identifying themultitude of coordinates by a localization device that is physicallydistinct from the second device. In one embodiment, the position of thefirst device is determined by the localization device.

In one embodiment, the method further includes, in part, identifying themultitude of coordinates during a setup phase by moving the localizationdevice along a perimeter of the first region of space. In oneembodiment, the second device includes, in part, a controller adapted toincrease the frequency of a first RF signal the second device transmitsto the localization device.

In one embodiment, the localization device includes, in part, a mixeradapted to downconvert the frequency of the first RF signal, a bandpassfilter adapted to filter out the components of the downconverted RFsignal that fall outside a predefined frequency band, an amplifieradapted to amplify the filtered RF signal, and an antenna adapted totransmit the amplified RF signal.

In one embodiment, the second device further includes, in part, areceiver adapted to receive the amplified RF signal transmitted by thelocalization device. In such embodiments, the controller is furtheradapted to determine the position of the localization device bycomparing the first RF signal to the amplified RF signal. In oneembodiment, the frequency is increased linearly in time.

In one embodiment, the method further includes, in part, transmitting anRF signal from the second device, positioning a reflector in the path ofthe transmitted RF signal thereby causing a reflected RF signal to reachthe first device, transmitting information from the first device to thesecond device about an amount of power in the reflected RF signalreceived by the first device, and determining the position of the firstdevice relative to the second device from the received powerinformation.

In one embodiment, the method further includes, in part, transmitting afirst RF signal from the second device to the first device where the RFsignal includes, in part, a first time stamp, receiving the first RFsignal at the first device, recovering the first time stamp at the firstdevice, recording a time at which the first RF signal is received by thefirst device where the recorded time corresponds to a second time stamp,and determining the position of the first device relative to the seconddevice from the first and second time stamps.

In one embodiment, the method further includes, in part, charging thefirst device using the RF signal carrying the wireless service. In oneembodiment, the method further includes, in part, forming a syntheticaperture radar to deliver an RF signal to the first device. In oneembodiment, the method further includes, in part, sending a multitude ofelectromagnetic pulses scanning along a multitude of azimuth andelevations where the multitude of pulses are oriented toward the firstdevice, and providing a 3-D mapping of the position of the first devicefrom the time of flight of pulses reflected by the first device.

In one embodiment, the method further includes, in part, transmitting atime-encoded acoustic signal from the second deice to the first device,recovering the encoded time at the first device, comparing a time atwhich the acoustic signal is received by the first device to the encodedtime to determine a time difference, and determining the position of thefirst device relative to the second device from the time difference. Inone embodiment, the second device is a phased array.

A wireless service delivery system, in accordance with one embodiment ofthe present invention, is configured to: determine a position of a firstdevice requesting the wireless service, deliver a wireless servicehaving a first tier/quality to the first device if the position isdetermined to fall within a first region of space, and deliver awireless service having a second tier/quality to the first device if theposition is determined not to fall within the first region of space.

In one embodiment, the first tier/quality of service results in a fasteraccess than the second class/quality of service. In one embodiment, thesecond tier/quality of service amounts to no service. In one embodiment,the wireless service delivery system further includes, in part, a memorystoring a multitude of coordinates of the boundary of the first regionof space. In one embodiment, the wireless service delivery systemfurther includes, in part, a localization device adapted to identify themultitude of coordinates.

In one embodiment, the localization device is further adapted todetermine the position of the first device. In one embodiment, thelocalization device is further adapted to identify the multitude ofcoordinates during a setup phase as it is moved along a perimeter of thefirst region of space. In one embodiment, the wireless delivery systemfurther includes, in part, a controller adapted to increase thefrequency of a first RF signal the wireless service delivery systemtransmits to the localization device.

In one embodiment, the localization device includes, in part, a mixeradapted to downconvert the frequency of the first RF signal, a bandpassfilter adapted to filter out components of the downconverted RF signalthat fall outside a predefined frequency band, an amplifier adapted toamplify the filtered RF signal, and an antenna adapted to transmit theamplified RF signal.

In one embodiment, the wireless service delivery system furtherincludes, in part, a receiver adapted to receive the amplified RF signaltransmitted by the localization device. A controller determines theposition of the localization device by comparing the first RF signal tothe amplified RF signal. In one embodiment, the frequency is increasedlinearly in time.

In one embodiment, the wireless service delivery system is furtheradapted to charge the first device using an RF signal via which thewireless service is delivered. In one embodiment, the wireless servicedelivery system is further adapted to form a synthetic aperture radar todeliver an RF signal to the first device. In one embodiment, thewireless service delivery system is further adapted to send a multitudeof electromagnetic pulses scanning along a multitude of azimuth andelevations where the pulses are oriented toward the first device, andprovide a 3-D mapping of the position of the first device from the timeof flight of the pulses reflected by the first device. In oneembodiment, the wireless service delivery system is a phased array.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a simplified high-level block diagram of a location-basedwireless service delivery system, in accordance with one exemplaryembodiment of the present invention.

FIG. 2 is a flowchart for a location-based wireless service delivery, inaccordance with one exemplary embodiment of the present invention.

FIG. 3 shows perimeters of different regions of a space receivingdifferent tiers of wireless service, in accordance with one exemplaryembodiment of the present invention.

FIG. 4 is a simplified high-level block diagram of a positiondetermination system, in accordance with one exemplary embodiment of thepresent invention.

FIG. 5 is a simplified high-level block diagram of a wireless servicedelivery system, in accordance with one exemplary embodiment of thepresent invention.

FIG. 6 is a simplified high-level block diagram of a wireless servicedelivery system, in accordance with one exemplary embodiment of thepresent invention.

FIG. 7 is a simplified high-level block diagram of a wireless servicedelivery system, in accordance with one exemplary embodiment of thepresent invention.

DETAILED DESCRIPTION OF THE INVENTION

It is often desirable to provide wireless service to users based ontheir locations. For example, a coffee shop owner/operator may want toprovide a free wireless Internet access to users located within itspremises but not to anyone outside of the coffee shop. In anotherexample, a service provider in an airport terminal may wish to providefaster Internet access or added features to people in a VIP zone, andslower access in other areas.

A location based access authentication would allow users to have properaccess without interaction with the service provider. For example, inwireless power delivery, location based authentication enables remotecharging/powering of user devices that have been authorized based on thelocation of the devices. It is also desirable to allow for differenttiers of power delivery based on the location of the users. For example,a user in a VIP area may receive more power than a user who is not inthe VIP area. Therefore, a user device(s) located in, for example, a VIParea may be wirelessly charged faster than devices that are outside theVIP area.

The following embodiments of the present invention are described withreference to methods and systems that enable location based accessauthentication for wireless power delivery. It is understood howeverthat embodiments of the present invention are equally applicable tolocation based access authentication in a variety of other wirelessapplications, such as data communication systems (e.g., 5G and massiveMIMO systems), sensing and the like.

In one embodiment, a location-based access authentication systemincludes, in part, a device associated with the service provider thatprovides a service, and/or a localization device adapted to determinethe location of a user requesting the service. The localization deviceis in communication with the service provider to, among other things,provide the location of a user. In other embodiments, the localizationdevice is integrated in the same device as the service provider. Thefollowing description of a number of embodiments of the presentinvention is described with reference to a service provider that has anintegrated localization device. It is understood however that, asdescribed above, the service provider and the localization device may bedifferent physical devices operating under the control of the serviceprovider.

In one embodiment, the service provider provides services based on a setof rules and in accordance with one or more algorithms that determinewhat service(s), if any, is to be provided to the users at variouslocations. Such rules and algorithm use the location as a factor indetermining the tier/quality of the service. The rules set that providesa mapping between the authorized service level and the location of theuser may be generated in several ways, as described further below.

FIG. 1 is a simplified high-level block diagram of a wireless serviceprovider device 10 (alternatively referred to herein as serviceprovider) adapted to provide wireless service to device user 20(alternatively referred to herein as user) positioned within authorizedzone 25, and not to provide service to user 22 positioned outside zone25, in accordance with one embodiment of the present invention. Serviceprovider 10 is shown as including, in part, a controller 12 thataccesses a look-up table to determine the rules and algorithms thatdefine what services, if any, is to be provided to users at variouslocations. Localization device 15 is adapted to locate the position ofeach user 15 in order to apply the rules and algorithms.

FIG. 2 is a flowchart 30 for location based access authorization, inaccordance with one embodiment of the present invention. The processstarts at 32. At 34, a localization device, such as device 15 shown inFIG. 2, establishes the location of the user service. At 36, using alist of authorized locations/zones, the proximity of the user to theauthorized zones, such as the zone 25 shown in FIG. 1, is determined. Ifat 36, the user is detected as being within an authorized zone, theservice provider begins to provide service to the user. Otherwise, theservice provider does not provide service to the user.

In accordance with one embodiment, the rule set is formed during aninitial procedure by placing a localization device (alternativelyreferred to herein as service setup device), which is in communicationwith the service provider, in each of the desired locations andspecifying the service level for each such location. The space (alsoreferred to herein alternatively as zone) defined, for example, by afirst set of such locations receives the same, e.g., level-1 service;the space defined, for example, by a second set of such locationsreceives the same, e.g. level-2 service, and the like. Areas outside,e.g., the second zone will not receive any service. The coordinates ofthe service setup device at each location may be identified using anyknown or future position determination technique, such as GPS, lasers,and the like. In one embodiment, the service setup device also providesthe type of service (tier or quality of service) designated for eachlocation.

In accordance with another exemplary embodiment of the presentinvention, a zone defined to receive the same service level isdetermined by moving the localization device along the perimeter of thezone. Knowing the coordinates of each point along the perimeter, theservice provider establishes the rule set such that the points internalto the perimeter of the zone are given access to the same service level.FIG. 3 shows a perimeter 10 within whose boundary, service provider 15is configured to provide a level-1 service. Likewise, the area definedbetween perimeters 10 and 20 receive a level-2 service from serviceprovider 15. The area outside perimeter 20 is indicated not to receiveservice from service provider 15.

In one embodiment, the localization device includes an active radiofrequency (RF), microwave or mm-wave ranging sensor that performs thelocalization (i.e., position determination). In accordance with one suchembodiment, to determine the distance between two devices, such as thedistance between the service provider and the localization device, theservice provider sends an RF signal that linearly increases infrequency. The localization device downconverts, and amplifies thereceived RF signal before transmitting it back to the service provider.By comparing the transmitted RF signal to the RF signal that the serviceprovider receives from the localization device, the service providerdetermines the position of the localization device.

FIG. 4 is a simplified high-level block diagram of a system 150configured to determine the distance between first and second devices100, 200 disposed therein, in accordance with one exemplary embodimentof the present invention. Device 100—which may correspond to a serviceprovider device as described above—is shown as including a transmitter120, a receiver 140, a controller 150, a transmit antenna 110 and areceive antenna 130. Device 200—which may correspond to a localizationdevice as described above—is shown as including a mixer 210, a bandpassfilter 220, an amplifier 230, a transmit antenna 250 and a receiveantenna 240.

Controller 150 causes transmitter 120 to transmit an RF signal (viaantenna 110) with a frequency that increases, e.g., linearly, with time.For example, assume transmitter 120 transmits an RF signal whosefrequency at times T1 and T2 are respectively 10 GHz and 11 GHz due tosuch an increase. Device 200 downconverts the RF signal—which itreceives via receive antenna 240—using mixer 210 to an intermediatefrequency. For example, assume that mixer 210 downconverts the received10 GHz and 11 GHz frequency signals to 2 GHz and 3 GHz signals (i.e.,the frequency offset is 8 GHz) using the local oscillator signal appliedto mixer 210. Bandpass filter 220 filters out the components of mixer210's output that fall outside the desired frequency band. Amplifier 230amplifies the output signal of bandpass filter 220 and causes theamplified signal to be transmitted via transmit antenna 250. The RFsignal transmitted by antenna 250 is then received by receive antenna130 of device 100. By comparing the difference between the RF signalbeing transmitted by antenna 110 at any given time to the RF signalbeing received by antenna 130 at that time, controller 150 determinesthe distance between devices 100 and 200.

In accordance with another embodiment of the present invention, thedistance between the devices is determined by using highly reflectivecorner reflectors adapted to backscatter the transmitted RF signal. TheRF signal backscattered by the corner reflector(s) is then received bythe user. In such embodiments, a wireless communication link establishedbetween the user (or the setup device during the initial setup) and theservice provider provides information from the user to the serviceprovider regarding the amount of RF power being received by the userfrom the service provider. Accordingly, the ranging systems or sensorsdisposed in the service provider have a high degree of confidence thatthe signal being received by the service provider is transmitted by theuser/setup device. In another embodiment, the user/setup device mayreceive and retransmit the RF signal after modifying the receivedsignal. Such modifications include, but are not limited to, change inthe frequency of the RF signal transmitted by the service provider, aswell as addition of modulation encryption keys to facilitate positiondetermination, and further distinguish the user/setup device from thesurrounding objects or other users.

In accordance with another embodiment of the present invention, theservice provider attaches a time stamp to a message it transmits. Theuser/setup device then attaches a second timestamp at the time ofarrival of the message and returns the message with both time stamps.The time stamps are subsequently used to estimate the time of flight inorder detect the distance between the two devices. The time stamp arequite accurate in determining the distance when using, for example, aGPS synchronized clock that is available in most of today's moderndevices.

In one embodiment, the service provider is adapted to wirelesslytransfer power to the user. The user can use the received power foroperation or for charging its battery or short term storage (e.g., supercapacitor). In such embodiments, the service provider may use syntheticaperture radar to form an RF energy focus zone where the user mayrecover the energy. The service provider may also use the syntheticaperture radar for ranging and sensing applications without the need foran extra radio-based location determination device.

In one embodiment, the service provider, delivering wireless power,switches its operation from RF Power lensing to synthetic apertureranging and sensing by sending a train of EM pulses that scan alongazimuth and elevation, and observing the reflections. The time of flightof the pulses provides the distance of the object (such as the userdevice or the set up device) for each elevation and azimuth.Accordingly, a full 3D mapping of the location of the object isobtained. In one embodiment, the user/setup device may modulate the backreflection intensity by changing the termination impedance of itsantenna to uniquely identify itself from other objects that also reflectthe pulses.

FIG. 5 shows an exemplary service provider 300 adapted to deliverwireless service/power to service user 350, in accordance with oneembodiment of the present invention. Service provide 300 is shown asincluding, in part, a 3×5 array of transmitters 305 ₁₁, 305 ₁₂, 305 ₁₃.. . 305 ₅₁, 305 ₅₂ and 305 ₅₃ adapted to, among other thing, deliver RFpower to user device 350. User device 350 is shown as including, inpart, an antenna 310, a transmission line 355, and a switch 360. It isunderstood that other components of device 350 are not shown forclarity. When switch 360 is in position S₁, the terminating impedance ofantenna 310 is defined by the resistance of resistor 370 which has afinite resistance. When switch 360 is in position S₂, the terminatingimpedance of antenna 310 is defined by path 365 which is shorted to theground. By changing the position of switch 360, the terminatingimpedance of antenna 310 and thus the amplitude of the signal beingtransmitted by antenna 310 is varied.

In another embodiment, the service provider, delivering wireless power,is adapted to switch operation from RF Power lensing to syntheticaperture ranging and sensing by sending a train of RF signals with, forexample, linearly increasing frequency for each azimuth and elevationangle. The reflected RF signal will arrive at the service provider at alater time. The frequency difference between the transmitted andreceived signal at the service provider is proportional to time offlight which together with azimuth and elevation angles is used tocreate a 3D map of the surrounding, as was described further above. Theuser/setup device may be configured to modulate the reflections at aslower rate than the linearly increasing frequency period to identifyitself.

In one embodiment, an ultrasonic range finder may be disposed in theservice provider device and/or the user/setup device. In suchembodiments, the service provider scans its beam through a multitude ofazimuth and elevation angles. The user/setup device reports back to theservice provider the received RF power via a wireless link. The azimuthand elevation of the user/setup device is determined when the maximumpower is reported back by the user/setup device. The distance from theuser/setup device to the service provider device is determined by theultrasonic range finder. In one embodiment, the service provider (or theuser/setup device) transmits a time coded ultrasonic signal (such as alinearly increasing frequency or pulses), and the user/setup (or theservice provider) decodes the received acoustic signal so as to retrievethe encoded time and compare it its own local time. Using the time offlight and the speed of sound the distance between the two devices maybe determined.

There are a number of advantages in using an acoustic range findercompared to an RF range finder. Because the speed of sound is six ordersof magnitude (about one million times) smaller than the speed oflight—hence time of flight of sound is six orders of magnitude longer—anacoustic range finder is easier and simpler to implement and can uselower speed electronic components.

Another advantage of an acoustic range finder is that it uses a loweramount of bandwidth for localization. Transmitting pulse or chirpsignals for RF range detection requires large system bandwidth which notonly complicates the system designs, but may result in interference withother systems operating within the same band. Detecting only elevationand azimuth requires a very small bandwidth as it relies on the receivedpower.

FIG. 6 shows an exemplary service provider 300 adapted to deliverwireless service/power to user 350, in accordance with one embodiment ofthe present invention. Service provide 300 is shown as including, inpart, an RF antenna 308, an acoustic signal transmitter 370, and a 3×5array of transmitters 305 ₁₁, 305 ₁₂, 305 ₁₃ . . . 305 ₅₁, 305 ₅₂ and305 ₅₃ adapted to, among other thing, deliver RF power to user device350. Device user 350 is shown as including, in part, an RF antenna 318,and acoustic detector 375. To locate user 350, service provider 350transmits a time encoded acoustic signal via acoustic signal transmitter370. The acoustic signal detector 375 receives and decodes the receivedacoustic signal so as to retrieve the encoded time and compare it touser 350's own local time. Using the time of flight and the speed ofsound, the distance between service provider 300 and service user 350 isdetermined. Communication and transmission of information betweenservice provider 300 and service user 350 is carried out via an RF linkestablished between antennas 308 and 318, as shown.

In accordance with another embodiment, the position of a service/setupdevice relative to the service provider is obtained using the phasesettings of a phased array disposed in the service provider. FIG. 7shows an exemplary phased array 400 adapted to deliver wirelessservice/power to user 350, in accordance with one embodiment of thepresent invention. Phased array 400 is shown as including, in part, anRF antenna 308, and a 3×5 array of transmitting elements 405 ₁₁, 405 ₁₂,405 ₁₃ . . . 405 ₅₁, 405 ₅₂ and 405 ₅₃ adapted to, among other thing,deliver RF power to device 350. User device 350 is shown as including,in part, an RF antenna 318. For a relatively large phased array,powering up devices not very far away (i.e., within the phased array'sFresnel diffraction region), the phase profile distribution thatmaximizes power transfer to the user device uniquely identifies thedevice location. For an optical phased array, the phase profiledistribution or settings that maximizes power transfer corresponds tothe one that focuses the light from various transmitting elements to theposition of the user device. Accordingly, the authorized regions(regions that are designed for authentication) in space are mapped to amultidimensional phase space.

The above embodiments of the present invention are illustrative and notlimitative. Embodiments of the present invention are not limited by thetype of device that may be wirelessly charged. Other additions,subtractions or modifications are obvious in view of the presentdisclosure and are intended to fall within the scope of the appendedclaims.

What is claimed is:
 1. A method of wireless service delivery;determining a position of a first device requesting the wirelessservice; delivering a wireless service defined by a first tier/qualityto the first device if the position is determined to fall within a firstregion of space; and delivering a wireless service defined by a secondtier/quality to the first device if the position is determined not tofall within the first region of space.
 2. The method of claim 1 whereinsaid first tier/quality of service provides a faster access than thesecond class/quality of service.
 3. The method of claim 2 wherein saidsecond tier/quality of service is defined by no wireless access.
 4. Themethod of claim 1 further comprising: storing a plurality of coordinatesrepresentative of a boundary of the first region of space.
 5. The methodof claim 4 wherein said plurality of coordinates is stored in a memorydisposed in a second device providing the wireless service.
 6. Themethod of claim 5 further comprising: identifying the plurality ofcoordinates by a localization device that is physically distinct fromthe second device.
 7. The method of claim 6 wherein the position of thefirst device is determined by the localization device.
 8. The method ofclaim 6 further comprising: identifying the plurality of coordinatesduring a setup phase by moving the localization device along a perimeterof the first region of space.
 9. The method of claim 6 wherein saidsecond device comprises a controller adapted to increase a frequency ofa first RF signal the second device transmits to the localizationdevice.
 10. The method of claim 9 wherein said localization devicecomprises: a mixer adapted to downconvert the frequency of the receivedfirst RF signal; a bandpass filter adapted to filter out components ofthe downconverted RF signal that fall outside a predefined frequencyband; an amplifier adapted to amplify the filtered RF signal; and anantenna adapted to transmit the amplified RF signal.
 11. The method ofclaim 10 wherein said second device comprises: a receiver adapted toreceive the amplified RF signal transmitted by the localization device,wherein said controller is further adapted to determine a position ofthe localization device by comparing the first RF signal to theamplified RF signal.
 12. The method of claim 11 wherein said frequencyis increased linearly in time.
 13. The method of claim 5 furthercomprising: transmitting an RF signal from the second device;positioning a reflector in a path of the transmitted RF signal therebycausing a reflected RF signal to reach the first device; transmittinginformation from the first device to the second device about an amountof power in the reflected RF signal received by the first device; anddetermining the position of the first device relative to the seconddevice at the second device from the received power information.
 14. Themethod of claim 5 further comprising: transmitting a first RF signalfrom the second device to the first device, said RF signal comprising afirst time stamp; receiving the first RF signal at the first device;recovering the first time stamp at the first device; recording a time atwhich the first RF signal is received by the first device, said recordedtime corresponding to a second time stamp; and determining a position ofthe first device relative to the second device from the first and secondtime stamps.
 15. The method of claim 1 further comprising: charging thefirst device from an RF signal carrying the wireless service.
 16. Themethod of claim 5 further comprising: forming a synthetic aperture radarto deliver an RF signal to the first device.
 17. The method of claim 1further comprising: sending a plurality of electromagnetic pulsesscanning along a plurality of azimuth and elevations, said plurality ofpulses oriented toward the first device; and providing a 3-D mapping ofthe position of the first device from a time of flight of pulsesreflected by the first device.
 18. The method of claim 5 furthercomprising: transmitting a time-encoded acoustic signal from the seconddeice to the first device; recovering the encoded time at the firstdevice; comparing a time at which the acoustic signal is received by thefirst device to the encoded time to determine a time difference; anddetermining a position of the first device relative to the second devicefrom the time difference.
 19. The method of claim 5 wherein said seconddevice is a phased array.
 20. A wireless service delivery systemconfigured to: determine a position of a first device requesting thewireless service; deliver a wireless service defined by a firsttier/quality to the first device if the position is determined to fallwithin a first region of space; and deliver a wireless service definedby a second tier/quality to the first device if the position isdetermined not to fall within the first region of space.
 21. Thewireless service delivery system of claim 21 wherein said firsttier/quality of service provides a faster access than the secondclass/quality of service.
 22. The wireless service delivery system ofclaim 22 wherein said second tier/quality of service is defined by nowireless access.
 23. The wireless service delivery system of claim 20further comprising: a memory storing a plurality of coordinatesrepresentative of a boundary of the first region of space.
 24. Thewireless service delivery system of claim 23 further comprising: alocalization device adapted to identify the plurality of coordinates.25. The wireless service delivery system of claim 24 wherein thelocalization device is further adapted to determine the position of thefirst device.
 26. The wireless service delivery system of claim 24wherein the localization device is further adapted to identify theplurality of coordinates during a setup phase as it is moved along aperimeter of the first region of space.
 27. The wireless servicedelivery system of claim 24 wherein said delivery system furthercomprises a controller adapted to increase of a frequency of a first RFsignal the wireless service delivery system transmits to thelocalization device.
 28. The wireless service delivery system of claim27 wherein said localization device comprises: a mixer adapted todownconvert the frequency of the received first RF signal; a bandpassfilter adapted to filter out components of the downconverted RF signalthat fall outside a predefined frequency band; an amplifier adapted toamplify the filtered RF signal; and an antenna adapted to transmit theamplified RF signal.
 29. The wireless service delivery system of claim28 wherein said wireless service delivery system further comprises: areceiver adapted to receive the amplified RF signal transmitted by thelocalization device, wherein said controller is further adapted todetermine a position of the localization device by comparing the firstRF signal to the amplified RF signal.
 30. The wireless service deliverysystem of claim 29 wherein said frequency is increased linearly in time.31. The wireless service delivery system of claim 20 wherein thewireless service delivery system is further adapted to charge the firstdevice using an RF signal via which the wireless service is delivered.32. The wireless service delivery system of claim 20 wherein thewireless service delivery system is further adapted to form a syntheticaperture radar to deliver an RF signal to the first device.
 33. Thewireless service delivery system of claim 20 wherein the wirelessservice delivery system is further adapted to: send a plurality ofelectromagnetic pulses scanning along a plurality of azimuth andelevations, said plurality of pulses oriented toward the first device;and provide a 3-D mapping of the position of the first device from atime of flight of pulses reflected by the first device.
 34. The wirelessservice delivery system of claim 20 wherein the wireless servicedelivery system is a phased array.